摘要
钢轨扣件扣压力对车辆运行安全具有重要作用。该文通过室外试验获得了钢轨在不同紧固条件下的竖向振动加速度响应。采用正交经验模态分解方法得到原始振动信号的正交固有模态函数(Intrinsic Mode Funtion,IMF)。然后基于正交IMFs得到Hilbert时频谱和边界谱,并计算和比较了相应的熵。分析结果表明,该方法可用于检测不同钢轨扣件的扣压力。
The toe load of rail fasteners plays an important role in the vehicle operation safety.This paper obtains the vertical vibration acceleration response of rails under different fastening conditions through outdoor tests,obtains the orthogonal Intrinsic Mode Function(IMF)of the original vibration signal by the orthogonal empirical mode decomposition method,then obtains the Hilbert time-frequency spectrum and boundary spectrum based on orthogonal IMFs,and calculates and compares the corresponding entropy.Analysis results show that this method can be used to detect the toe load of different rail fasteners.
作者
周方赛
宋瑞
刘治府
陈靖开
ZHOU Fangsai;SONG Rui;LIU Zhifu;CHEN Jingkai(School of Civil and Architecture Engineering,Nanchang Institute of Technology,Nanchang,Jiangxi Province,330029 China)
出处
《科技资讯》
2023年第9期222-225,共4页
Science & Technology Information
基金
2021年国家大学生创新创业训练计划资助项目(项目编号:202111319006)
江西省科技厅自然科学基金资助项目(项目编号:20202BAB204027)。
关键词
正交经验模态分解
时频熵
钢轨扣件状况
Hilbert时频谱
Orthogonal empirical mode decomposition
Time-frequency entropy
Rail fastening condition
Hilbert time-frequency spectrum
